shedder

func (*AdmissionControlSpec) CreateFilter ¶

func (spec *AdmissionControlSpec) CreateFilter(args []interface{}) (filters.Filter, error)

CreateFilter creates a new admissionControl filter with passed configuration:

admissionControl(metricSuffix, mode, d, windowSize, minRps, successThreshold, maxRejectProbability, exponent)
admissionControl("$app", "active", "1s", 5, 10, 0.1, 0.95, 0.5)

metricSuffix is the suffix key to expose reject counter, should be unique by filter instance mode is one of "active", "inactive", "logInactive"

active will reject traffic
inactive will never reject traffic
logInactive will not reject traffic, but log to debug filter settings

windowSize is within [minWindowSize, maxWindowSize] minRps threshold that needs to be reached such that the filter will apply successThreshold is within (0,1] and sets the lowest request success rate at which the filter will not reject requests. maxRejectProbability is within (0,1] and sets the upper bound of reject probability. exponent >0, 1: linear, 1/2: qudratic, 1/3: cubic, ..

see also https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/admission_control_filter#admission-control

func (*AdmissionControlSpec) Name ¶

func (*AdmissionControlSpec) Name() string

func (*AdmissionControlSpec) PostProcessor ¶

func (*AdmissionControlSpec) PostProcessor() *admissionControlPost

func (*AdmissionControlSpec) PreProcessor ¶

func (*AdmissionControlSpec) PreProcessor() *admissionControlPre